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Search Again :: Adv Search 1000 results in 0.110s
<1234567…34>
  • 128k Shadow Screen?When emulating the shadow screen in bank 7 should that bank be switched into address C000? If so, what happens if bank 7 is switched out without canc…

    When emulating the shadow screen in bank 7 should that bank be switched into address C000? If so, what happens if bank 7 is switched out without cancelling the shadow?
    Unique Unique February 2005 Development
  • Speccy 128 Shadow screen.How much is the shadow screen used in 128k commercial software? I ask because I am looking at putting 128k of memory in the 48k setup I have been bu…

    How much is the shadow screen used in 128k commercial ... only thing i cant seem to find a way around. ...

    Basically to get around this issue, i ... pain), Alas, its easy to determine when the CPU is ... *trying* to access it, but it may ...
    spodula spodula January 2011 Hardware
  • (part of) screen to UDGHere is a routine to copy a Y,X-position on screen to a UDG. 0<=y<=23 0<=x<=31 144<=udg<=165 (UDG "A" to UDG "U") [code] ; start code with ; PRINT …

    Here is a routine to copy a Y,X-position on screen to a UDG.
    0
    Dr BEEP Dr BEEP June 2011 Development
  • 128K shadow screen?Hi How does the shadow screen feature work , and how can it be used?

    Hi

    How does the shadow screen feature work , and how can it be used?
    micken micken May 2014 Development
  • 'orange' on a spectrumalways wondered why spectrums could never seem to achieve the colour orange? wasn't one of the default colours, and don't remember seeing anything th…

    ... per-pixel basis (that's to say, an orange-looking ... di
    ;set main screen ATTR to BRIGHT RED
    ld hl ... /> ldir

    ; flick shadow screen into $c000
    ld a,($5b5c)

    ;set shadow screen ATTR to BRIGHT YELLOW
    ld hl ...
    Digital Prawn Digital Prawn August 2008 Sinclair Miscellaneous
  • 'orange' on a spectrumalways wondered why spectrums could never seem to achieve the colour orange? wasn't one of the default colours, and don't remember seeing anything th…

    ...

    ;set main screen ATTR to increasing numbers
    ld d ... , attrfill0

    ; flick shadow screen into $c000
    ld a,($5b5c)
    ldir

    ;set shadow screen ATTR to decreasing numbers
    ld d ...
    Digital Prawn Digital Prawn August 2008 Sinclair Miscellaneous
  • Basic Screen Shadow QuestionHello, I've been porting a game to the Spectrum from another platform. So far so good and I have per pixel screen scrolling working really nicely …

    ... the normal screen since they are likely initialized to #38 by ... anything you seem to be falling through to the bank switching ... you want to have one screen paged in at #C000 so you ... />
    Display shadow screen, page in normal screen at #C000:
    the OUT ...
    Hikaru Hikaru August 2016 Development
  • Bug-Eyed Blob Things[URL="http://www.speccyjam.com/games/bug-eyed-blob-things/"]Bug-Eyed Blob Things[/URL] is a great game, that won the [URL="http://www.speccyjam.com/"…

    ... [/URL]. Someone should port it to a real Speccy!
    ... /> update all at once on screen
    [/CODE]
    Although ... may require using the 128K shadow screen to make it look good, and ... sp1 supports shadow screen... If not, it may be necessary to reimplement ...
    Einar Saukas Einar Saukas November 2014 New game ideas
  • What do you think.Do you think if you went back in time and made a Sudoku game for the spectrum you would be a millionaire now? (all my get rich quick schemes invole …

    I would tell Sir Clive to alter the ZX Spectrum a ... the following alterations:

    Screen to #C000 or #4000 possible like 128K ... />
    When in ZX81 mode screen to #C000, making all software compatible between ... use 1 RST for jump to own routine with a ...
    Dr BEEP Dr BEEP February 2006 Games
  • What do you think.Do you think if you went back in time and made a Sudoku game for the spectrum you would be a millionaire now? (all my get rich quick schemes invole …

    ... /> I would tell Sir Clive to alter the ZX Spectrum a ... the following alterations:

    Screen to #C000 or #4000 possible like 128K ... use 1 RST for jump to own routine with a SYSVAR ... a RST for a call to my own software.
    [/quote ...
    rich_chandler rich_chandler February 2006 Games
  • TAP conversion project?I was wondering if there's any concerted effort to produce TAP versions of games only available in TZX or Z80/SNA/SLT format? Or are snapshots consid…

    ... = $1B00 -- this obviously relates to the loading screen. It calls a routine ... the screen has loaded. Now, hit Alt-F9 to dump memory to disk ... stack pointer, changes to page 7, copies the loading screen to $C000 (ie. the ...
    StuBruise StuBruise September 2006 Games
  • Ways to use double buffering in basicI was meddling with woody's print stream code where you can print characters at any pixel location on screen. I was playing with 12 sprites, very ann…

    ... it short! Be sure to run it in an ... the switch from shadow screen to the updated main screen is not synchronized ... , I not used basin to wrote it. The keywords ... this programs to test a new addition to my z80util ... few days I expect to finish and publish the ...
    NotFound NotFound November 2006 Sinclair Basic
  • Ahh.. the tape loading era! by ate bit[url]http://www.pouet.net/prod.php?which=53846[/url] It is UNBELIEVABLE!!! Effects while loading, MUSIC while loading (and loading normal speed !!!…

    ... 's using the 128's shadow screen to avoid flicker (normally you'd ... use HALT to synchronise with the screen drawing, but that ...
    gasman gasman September 2009 Sinclair Miscellaneous
  • Alice in Wonderland (FULL VERSION!) on ZX SpectrumNot really a game but a film and I'm uncertain which forum to put this in so (Moved it to Misc - Mod).... I've uploaded two tap video copies of [B]A…

    ... have finally got around to trying this with my ... The program needs the 128k shadow screen to work, so it won't ... the load always goes to 49152) from the way ... can't get page switching to work properly every time. ... I can get stuff to go to page 7, sometimes I ...
    mulder mulder May 2010 Sinclair Miscellaneous
  • Alice in Wonderland (FULL VERSION!) on ZX SpectrumNot really a game but a film and I'm uncertain which forum to put this in so (Moved it to Misc - Mod).... I've uploaded two tap video copies of [B]A…

    ... The program needs the 128k shadow screen to work, so it won' ... hunting for this again to see how it was ... therefore the load always goes to 49152) from the way ... can't get page switching to work properly every time. ... I can get stuff to go to page 7, sometimes I ...
    Alien 8 Alien 8 May 2010 Sinclair Miscellaneous
  • z88dk and im2I set up a minimal IM2 mode so I can draw sprites for a laff [code] #include <string.h> #include <stdio.h> #include <im2.h> #include <stdlib.h> #in…

    ... the super fast pushy routine to copy shadow screen to the real one -
    tstih tstih October 2013 Development
  • Using the stack to blit bufferI was using a ldir to blit my back buffer to the screen RAM, and it was working pretty well if not rather slow. After reading about using the stack …

    ... is also used to draw sprites to a 'buffer' screen. Maybe we are ... routine", or "copying a shadow screen to the main screen". I usually mean the ...
    Timmy Timmy February 2014 Development
  • I feel they could have done this.After reading the ZX Spectrum ULA, I learned about how the ULA detects if the Z80 if going to access memory in the next cycle and stops it if the ULA…

    ... software would have to keep either a compete shadow screen, or parts thereof ... you were to copy data to the screen, as in copy the "shadow screen" to the ... video RAM, it may take too long to do ...
    1024MAK 1024MAK August 2015 Hardware
  • Please test your ZX128+2 (grey model)Please reset your ZX128+2 (grey) and write in 128 basic (or in USR0 mode): [B]PRINT IN 32765[/B] - if basic crash (black screen) then your ZX contai…

    I get the same blank screen on my +2 (grey). When ... from port #7ffd causes the shadow screen to be displayed.

    Anyone ...
    zub zub September 2015 Hardware
  • Please test your ZX128+2 (grey model)Please reset your ZX128+2 (grey) and write in 128 basic (or in USR0 mode): [B]PRINT IN 32765[/B] - if basic crash (black screen) then your ZX contai…

    ... "]I get the same blank screen on my +2 (grey). When ... from port #7ffd causes the shadow screen to be displayed.

    Anyone ...
    MatGubbins MatGubbins September 2015 Hardware
  • Please test your ZX128+2 (grey model)Please reset your ZX128+2 (grey) and write in 128 basic (or in USR0 mode): [B]PRINT IN 32765[/B] - if basic crash (black screen) then your ZX contai…

    ... "]I get the same blank screen on my +2 (grey). When ... from port #7ffd causes the shadow screen to be displayed.

    Anyone ...
    mityay mityay October 2015 Hardware
  • Please test your ZX128+2 (grey model)Please reset your ZX128+2 (grey) and write in 128 basic (or in USR0 mode): [B]PRINT IN 32765[/B] - if basic crash (black screen) then your ZX contai…

    ... "]I get the same blank screen on my +2 (grey). When ... from port #7ffd causes the shadow screen to be displayed.

    Anyone ...
    Alessandro Grussu Alessandro Grussu October 2015 Hardware
  • If you had four roms...Just wondering if you were designing a Spectrum from scratch, and you used a 27512 EPROM, which would hold about 4 spectrum roms, what you would inst…

    ... bank 5 and the shadow screen) to a 16k or downgraded 48k ... up making much sense to use instead of just ... this is always pretty easy to come up with, but ... custom firmware and software to run on the system ... 's probably more rewarding to ditch the flaky Sinclair ...
    guesser guesser February 2021 Hardware
  • Basic Screen Shadow QuestionHello, I've been porting a game to the Spectrum from another platform. So far so good and I have per pixel screen scrolling working really nicely …

    ... .

    [code]screen_data EQU $C000
    attrib_data EQU $C800
    to and displaying the shadow screen
    ld b ... : Select normal (0) or shadow (1) screen to be displayed.
    change_bank:
    pointblnk pointblnk August 2016 Development
  • Optimisation Needed! Is this the Fastest way to copy bytes from screen and back again?I have the screen address (say 0,0 i.e 16384) I want to copy 4 bytes wide by 32 bytes high from the screen to an area of memory. I then want to cop…

    ... 32 bytes high from the screen to an area of memory.
    to copy from screen to store)

    Basically ...


    ; Clear the screen to show we are bringing back ...
    robpearmain robpearmain November 2005 Development
  • Convert Screen to TAPHow do I take the screen display and save it as a tap (I am basically trying to create 3 taps, one for the basic loader, one for the screen, and one …

    How do I take the screen display and save it as a tap (I am basically trying to create 3 taps, one for the basic loader, one for the screen, and one for memory and then copy them all together into one tap file)

    Many thanks
    robpearmain robpearmain December 2005 Development
  • Noob to Z80 needing +3 helpI'm quite new to z80 programming, but i'm attempting to write some kind of windowing system that will run alongside BASIC on my +3 with Kempston mous…

    ... , and i plan to use RealSpec to test that.
    to proceed is to CLEAR basic down to 32767, ... the best way to pass parameters to, and return ... 3DOS interfere with the "shadow" screen area at the start ... already written (including access to+3DOS, though the ...
    rbsfou rbsfou January 2007 Development
  • Screen to vector?I've found old topics covering this subject and even spoke to Geoff about this, but still want to ask a few questions. I've been playing with vector…

    ... takes forever because everything has to be done manually, but ... starting coordinates, choosing an angle to follow a line, deciding where ... the line ends and how to jump to the next coordinates? Should ... are also easier to fix using Dunny's screen editor.
    < ...
    zxbruno zxbruno January 2010 Sinclair Miscellaneous
  • Totally random idea for the hardware nuts to exploreWhen it comes to multi-player games, how hard would it be to generate a second display from a single Speccy, instead of trying to link up machines, s…

    ... solution would be to simply produce a split-screen display, split the ... and have it display its shadow screen whilst the new board displays ... top 8K of memory to the external screen RAM.

    ... a copy of screen data from one machine to the other, but ...
    joefish joefish April 2014 Hardware
<1234567…34>

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